In modern installations, part of the burner information is transmitted via communication. If this is interrupted, alarms or incorrect status may appear without a mechanical failure.
What is lost with communication
Load, status, alarm, or command indications may be lost, depending on the design.
Hardwired interlocks
Critical safety signals often remain hardwired. A distinction must be made between a communication fault and an actual safety trip.
Network check
Device power supply, cables, terminators, switches, and communication status are examined.
Signal mapping
Following a PLC or firmware change, incorrect mapping may display an incorrect status even if the burner is operating correctly.
Diagnosis
The local indication on the burner controller is compared with the one visible to the central BMS.
